A self evident top rail to mount optics on your KWC mini uzi.
Take the dust cover off, slide the rail on from behind, make sure the charging handle can reciprocate backwards enough, and fix the rail with 4 M4x5mm (8-36) grub screws.
The dust cover can be freely removed and assembled with this rail in place. I've made two versions, one low profile which you can see on the pictures and one
high profile which is 20mm longer. With the short-low profile one you can mount an exps holo for example, but larger holosights will need the high profile one.
Both rails allow cowitness with the iron sights.
The pictures show an FDM printed piece, shapeways's SLS an MJF versions will look a lot smoother.